An apparatus for attenuating high frequency transients on AC power lines

An apparatus, for attenuating high frequency transients on AC power lines from damaging sensitive electrical and electronic circuits in an electrical load coupled to the AC lines with the AC power lines having an earth ground and the electrical load having an electrical load ground, comprises: an isolation transformer having a primary winding and a secondary winding with the primary winding having a primary source lead, a primary neutral lead, and a primary electrostatic shield lead and the secondary winding having a secondary source lead, a secondary neutral lead, and a secondary electrostatic shield lead; the primary source lead, primary neutral lead and primary electrostatic shield lead being electrically coupled to the AC power lines; the secondary source lead, secondary neutral lead and secondary electrostatic shield lead being electrically coupled to the electrical load; the primary electrostatic shield lead and the secondary electrostatic shield lead being electrically connected together and to the earth ground; and continuous attenuator means for attenuating high frequency transients electrically coupled between the earth ground and the electrical load ground.